/*目的：自己写一个由于同步嵌套引起的死锁！思路：多个线程在执行时，某一时刻，0-Thread绑定了LockA锁，1-Thread绑定了LockB锁！当0-Thread要去绑定LockB锁时 和 1-Thread要去绑定LockA锁时都不能绑定，此时两个线程不能继续进行！
*/
class Ticket implements Runnable{public boolean flag;Ticket(boolean flag){this.flag = flag;}Ticket(){flag=true;}public void run(){if(flag){ synchronized(MyLock.lockA){System.out.println(Thread.currentThread().getName() + " lockA &&--->lockB");try{Thread.sleep(100);}catch(InterruptedException e){} synchronized(MyLock.lockB){System.out.println(Thread.currentThread().getName() + " lockB");}}}else{ synchronized(MyLock.lockB){System.out.println(Thread.currentThread().getName() + " lockB &&--->lockA"); synchronized(MyLock.lockA){System.out.println(Thread.currentThread().getName() + " lockA");}}}}
}class MyLock{public static final MyLock lockA = new MyLock();public static final MyLock lockB = new MyLock();
}public class DeadLockDemo{public static void main(String[] args){//虽然new了两个任务对象，但是不影响演示由于同步嵌套引起的死锁情况// new Thread(new Ticket(true)).start();// new Thread(new Ticket(false)).start();///Ticket tt = new Ticket();//只产生一个线程任务！这样写还要控制好sleep的时间才好.....new Thread(tt).start();try{Thread.sleep(20);}catch(InterruptedException e){}tt.flag=false;new Thread(tt).start();}
}
)
)
